Cat litter box



FIG. 1 is a perspective view of a cat litter box showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a side elevational view;

FIG. 5 is an end elevational view; and

FIG. 6 is an exploded perspective view of the cat litter box with a section of the upper portion being broken away and omitted to show the top edge configuration. 

The ornamental design for a cat litter box, as shown and described. 